typename_unittest.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2020, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include <gtest/gtest.h>
#include <mrpt/typemeta/TTypeName.h>
#include <mrpt/typemeta/TTypeName_stl.h>
#include <iostream>
#include <memory>  // shared_ptr

struct MyFooClass
{
    using Ptr = std::shared_ptr<MyFooClass>;
};
namespace MyNS
{
struct MyBarClass
{
};
struct MyBarClass2
{
    DECLARE_TTYPENAME_CLASSNAME(MyNS::MyBarClass2)
};
}  // namespace MyNS

DECLARE_CUSTOM_TTYPENAME(MyFooClass);
DECLARE_CUSTOM_TTYPENAME(MyNS::MyBarClass);

#define TST_FOR_TYPE(__TSTTYPE) \
    EXPECT_STREQ(#__TSTTYPE, TTypeName<__TSTTYPE>::get().c_str())

// templates with a "," in its name break all our and gtest macros:
#define TST_FOR_TYPE2(__TSTTYPE, __TSTTYPE2ndpart)                            \
    if (std::string(#__TSTTYPE "," #__TSTTYPE2ndpart) !=                      \
        TTypeName<__TSTTYPE, __TSTTYPE2ndpart>::get().c_str())                \
        GTEST_FAIL() << "Failed: " << #__TSTTYPE "," #__TSTTYPE2ndpart        \
                     << "\n Computed type is: "                               \
                     << TTypeName<__TSTTYPE, __TSTTYPE2ndpart>::get().c_str() \
                     << endl;

TEST(TTypeName, types2str)
{
    using namespace mrpt::typemeta;
    using namespace std;

    // Basic types:
    TST_FOR_TYPE(int32_t);
    TST_FOR_TYPE(uint8_t);
    TST_FOR_TYPE(float);
    TST_FOR_TYPE(double);

    // STL:
    TST_FOR_TYPE(std::string);
    TST_FOR_TYPE(std::vector<double>);
    TST_FOR_TYPE(std::vector<int32_t>);
    TST_FOR_TYPE(std::set<double>);
    TST_FOR_TYPE(std::set<std::vector<double>>);

    TST_FOR_TYPE2(std::pair<int32_t, int32_t>);
    TST_FOR_TYPE2(std::map<double, std::set<int32_t>>);
    TST_FOR_TYPE2(std::array<double, 3>);

    // User-defined types:
    TST_FOR_TYPE(MyFooClass);
    TST_FOR_TYPE(MyNS::MyBarClass);
    TST_FOR_TYPE(MyNS::MyBarClass2);
    TST_FOR_TYPE(std::vector<MyFooClass>);
    TST_FOR_TYPE(std::set<MyNS::MyBarClass>);
    TST_FOR_TYPE(std::set<MyNS::MyBarClass2>);
    TST_FOR_TYPE2(std::vector<std::array<MyNS::MyBarClass, 10>>);
}

TEST(TTypeName, types2str_shared_ptr)
{
    using namespace mrpt::typemeta;

    TST_FOR_TYPE(std::shared_ptr<MyFooClass>);
    TST_FOR_TYPE(std::vector<std::shared_ptr<MyFooClass>>);
    EXPECT_STREQ(
        "std::shared_ptr<MyFooClass>",
        TTypeName<MyFooClass::Ptr>::get().c_str());
}

TEST(TTypeName, types2stdstring)
{
    using namespace mrpt::typemeta;
    using namespace std;

    auto st1 = TTypeName<uint8_t>::get();
    const std::string s1(st1.c_str());
    const std::string s2("uint8_t");
    EXPECT_STREQ(s1.c_str(), s2.c_str());
}